Toy adding machine



' To all lwhom t may concern:

UNITED STATES'i-i PATENT orties.'

'roY ADDING inner-nim.`

' application flied :February 7, 19721. `seriell-1ro.' 4435129.

v4E. LAnsoN,

Be it known thatI, ARTHUR a citizen of the United States,` and a `resident of the 'city of Chicago, in lthe county of Cook and State oflllinois, have invented full,`clear', and exact description. I y

My invention relates to improvements'm toy adding machines, and it consists" in they combinations, constructions and arrangements, herein 'described and claimedt I An object of my yinvention is to provide a toy adding machiney which resemb'lesra `regular adding machine andwhi'ch will curately add small numbers.

A further object "of my invention isito provide a toy adding machine' which is 'simp'lein constructionand operation. y

A further .object of `my inventionisv4 to Other objects and advantages will appear in the following specification7 and the novel. features of the invention will be particularly pointed out in the appended claim.

My invention is illustrated in the accont panying drawings, forming part of this application, in which- Figure 1 is-a sideelevation of the device,

Figure 2 is an end elevation of the device,

Figure 3 is a top plan view with a portion of the casing removed, and

Figure 4 is a section along the line 4 4 of Figure 1. 1

In carrying out my invention, I provide a casing comprising end walls 1 and 2 spaced from each other by a plate 'whichvis bent so as to form the sidewall 3, the semi-cylin drical .top 4 and the side wall 5 of the casing. Disposed in the casing and rotatably carried by the end walls 1 and 2 thereof, is a shaft 6 which is held from longitudinal movement by the nuts 7 and 8 that are mounted on its threaded ends. tate the turning of the shaft 6 in the casing, I mount a hand-wheel 9 adjacent the nut 8 shown in Figures 1 and 2.

To facililandlrigidlyfsecure it'fto the shaft 6 :by means @fanti-t IO-andthe nutL 8. y

Rrgidly secured to the shaft. 6' by. a vset screw l1 is a disc 12A having on its periphery a plurality' o fiiunibers 13'preferably conanew anduseful linprovementjinA Toy Add- Y i i' ing Machines, of 'which :the following va secutively numbered Yfrom one too'ne hundred,'"andliavingia'plurality 'of teeth 14 aid-A ]acent itsv Vperiph'ery ',and, projecting out- -`ward1yfy from Aone of its sides, each iof-, tlie teeth being disposed opposite an number. 'lnllhefdiscf 12 is adapted to rotate counterclock-wise as' shown by the' Adirection of the arrow in Figu`re`2.v bviously the disc V12 can be rotated by turning the hand-wheel 9,

since both "the handwheel and the dise are rigidly secured to' thelshaftb. An opening `providedin the s idefS-jof the casing rust above the periphery ofthev disc 13 land isofsucha width that only one of the num- 4 lbers on thel'disc can be seen therethrough rovide a device of thetype de scr'ibedhav- 'f' i ing means for quickly resetting the machine at lone time:

Rotatably disposed in the casing and positioired adjacent the 'opening 15 yis al peg 16 that has 'a d` isc'1"?l mounted thereon and fwli'ich held by two nuts 18. As ,will-"be seen in Figures 1 .andl 4, the disc '17 kismountc-id underneatl'i the casing anc'l' has a plurality of numbers imprinted on the surface that is adjacent the casing, any one of the numbers being adapted to register withthe opening 15.

A means for rotating the dis-c 12 for any predetermined distance is provided, and comprises a wheel 19 which is loosely mounted on the shaft 6. The wheel 19 is adapted to be moved by means of a handle 20 which is mounted adjacent the periphery thereof1 and extends through an arcuate slot 21 in the end wall 2 of the casing. The handle 20 is provided with a pointer 22 that' is bent up and over the casino' as is clearly 'plurality of consecutively arranged numbers 23 are im- Y printed on the casing and are positioned ad' jacent the end ofthe pointer 22. It should be noted that the spaces between the numbers on the disc 12 and between the num bers 23 on the casing are equal.

Movement is imparted from the wheel 19 tothe disc 12 by means of apawl 24 which is pivotally secured between lugs 25 pro-` jecting from the wheel 19. A spring 26 yieldingly retains the pawl 24 in engagement with the teeth v14 of the disc 12. A second pawl 27 diametrically opposed to the pawl 24 ispvotally mounted on a pin 28 which is carried by a plate 29. The pawl 27 is yieldingly kept in engagement with the teeth` 14 by means of a spring 30.

From the foregoing description ofthe various parts of the device, the opera-tion thereof may be readily understood. When one Wishes to add any number, as for example three, to the sum total shown, as one hundred and ten in Figure 1, he moves the handle 2O in a clockwise direction in the arcuate slot 21, carrying with it the pointer 22 and the wheel 19. The Wheel 19 is rotated until the pointer 22 is directly above the figure three of the numbers 23. The pawl 24 is carried around with the Wheel 19 and since the paWl 27 prevents the disc 12 from rotatin in a clockwise direction, the pawl 24 will ri e over three of the teeth 14 of the disc 12. Returning the handle to its normal position causes the Wheel 19 to rotate in a counterclockwise direction, the pawl 24 to engage the teeth 14 and to also rotate the disc 12 in a counterclockwise direction While the paw] 27 rides over three of the teeth 14. This movement adds three to the total. It will be observed that the numbers on the disc 17 designate hundreds, While the numbers on the disc 12 designate digits.

The machine can be readily turned back so as to register zero when the addition has been completed. This is accomplished by tui-nin the hand-Wheel 9 in a counterclock- Wise direction until the zero on the periphery of the disc 12 is in registration with the opening 5. The handle 20 performs a double This device is very simple in construction f.

and operation, has few moving partsand can be manufactured at a cheap price.

I claim:

A toy adding machine comprising a casing having a cylindrical-shaped top, and having an arcuate slot in one side thereof, a shaft carried by said casing, a disc carried by said shaft, a second disc rotatably carried by said casing, said second named disc being dis` posed adjacent to said first named disc, and having numbers thereon, said casing having an elongated opening adapted to show only one number on each of said discs at a given time, a Wheel secured to said shaft, said wheel when oscillated being adapted to rotate said first named disc, an arm carried by said Wheel and projecting through the arcuate slot, a series of numbers on the outer cylindrical surface of said casing, said last named numbers being spaced the same distance apart as the numbers on said lirst named disc, and a pointer carried by said handle and being disposed over the numbers on said casin AR'IIUR EDWARD LARSON. 

